Improvement in dental engines



S. D. ENGLE.

DENTAL-ENGINE.

No.16`9,345 Patenrled Nov. 2,1875.

I v By his tomey N. PErERs. PHOTOMTHOGRAPMER, WASHINGToN. D. G.

fiiivrrEn Sun'rns PATENT QEEroE.

STEPHEN D. ENGLE, OF HAZLETON, ASSIGNOR TO SAMUEL STCKTON WHITE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN DENTAL ENGlNES.

VSpecication forming part of Letters Patent No. 169,345, dated November 2, 1875; application filed July 6, 1875.

To all "whom it may concern:

Be it known that I, STEPHEN D. ENGLE, of Hazleton, in the county of Luzerne and State f of Pennsylvania, have inventedcertaiu new and useful Improvements in Dental Engines, 1 of `which the following is a specification:

My `invention relates to a water-motor of that class more especially designed for driving Ldental engines, and for other analogouspurposes, requiring high speed and small power.

"The objects-of the lirst part of my inven- .tion are, to vsecure great freedom of movement in the operating-tool while driving' it from au -engine or motor firmly xed in position, which :ends I attainby mounting the driven shaft, for that'which imparts motion to the tool, in

bearings'in a rocking frame pivoted to the engineframe, and connecting said shaft and that of the motor by a `flexible joint.

-I do not, however, broadly claim `the combination of a watermotor and aflexible shaft, as such combination is shown in the patent of W. W. Evans, datedy June 2, 1874..

The object 'of the `next part of `my invention :is to remove dust, chips, or moisture from the point at which the tool is operating, which end `I attain by combining with the motor an opl erating-tool and an vexhaust apparatus suitvably arranged for this purpose.

The object of the next part of my invention is to apply a jet of air or liquid `at or near the point upon which the `tool is operating, which I do by 'combining with the motor and operating-tool a pump and connecting-pipe to eject the fluid at the point desired.

The object of the next part of my invention is to supply liquid to the substance upon which the tool is operating, :and simultaneously to remove the liquid thus supplied,together with.

dust, chips, or borings of the tool, which ends I attain by combining with a motor and its operating-shaft an ejector-pump and an exY haust apparatus.

The object of the next part of mylinvention is to regulate the temperature of the iuid ejected, as above set forth, which end l attain by combining withA the motor a coil of pipe or other equivalent apparatus and a lamp or other apparatus, for heating or cooling the fluid passing through the pump.

The object of the next part of my invention is to prevent the trembling of the driven shaft, which end I attain by mounting the shaft in bearings of rubber or other equivalent elastic material in a tube supported upon Ythe rocking frame of lthe engine.

The object of the next part of: my invention is to increase the efficiency of the driving- -`wheel itself,\which end I attain by combining with the frame' of the motor a percussion-wheel, revolving in a tight case, a taperinginjectionnozzle, delivering the water tangentially upon the wheel, and a tangential discharge-pipe, which insures the discharge of the water without choking.

The subjectmatter claimed will hereinafter specifically be designated.

The accompanying drawings show all my improvementsas embodied in asingle apparatus in the best way now known to une, obviously, however, some of thepartsmay be used without the others, and in machines dif- `feringsomewhat in the details of their construction from those of the one hereinshown and described.

Figure 1 represents a vertical transverse section through the apparatus on the line mm of Fig. 2, and Fig. 2 represents a horizontal transverse section therethrough on the `line y y of Fig. 1.

The mechanism is mounted in a strong frame or bracket, A, preferably of metahadapted to be secured rmly in position by screws, or other Well-known fastenings, upon the floor or wall, an operating-chair, an operators table, or a work-bench. Apercussionwater-wheel, B, provided, by preference, with buckets b, of

the form shown in the drawings, is mounted,

in suitable bearings, in a tight case, C, firmly bolted to, or forming part of, the frame. The

shaft B of the wheel projects through the' casing at each side, the bearings of the shaft being securely packed to prevent leakage. The induction-pipe D tapers gradually toward the wheel, its nozzle being made square at the end and directed slightly inward, so as to cause the water to impinge with its full force and in a solid stream against the bucket before striking the casing. After passing around about two-thirds of the circumference of the f materialpossessing sufficient firmness and elasticity, and arranged at short intervals Within the tube.n The shaft is thus preventedV from trembling. The lower end of this shaft G is connected With a ilexible Wire-coil shaft, F, 0f Well-known construction, which latter is connected by a slip-couplin g, f, With the shaft B' of the Water-Wheel. By this mode of connection the shaft F can be turned at Various angles toits driving-shaft Without interrupting the transmission of the driving-power. A swinging joint or ilexible driving-shaft may be used at the opposite end of the shaft G, the operating-tool being mounted in a suitable hand-piece connected With said post or shaft, as is common in dental engines. To remove -moisture, chips, or dust from the point at which the operation is being performed, I em- Vploy a pipe, H, having a suitable mouth, and

passing through the rocking bail E to the casble stop-cock or valve, k. The main portion of vthis pipe is, by preference, made rigid, but

that part between the bail and Water-wheel is made ilexible, in order to accommodate itself to the movements of the other-parts. By this means the vacuum produced by the motion of the Wheel creates a steady exhaust or draft through lthe pipe FI, sufficientV to draw olf saliva from the mouth of the patient, or even fine borings or filings. A similar pipe, L, provided With a suitable nozzle, is arranged near the point of operation,to discharge a jet of air or liquid at thegpoint being operated upon. This pipe, like the other, H, is secured to the bail,and is lmade flexible between the bail and the motor, so as to conform to the movements of the operating-tool, and is connected With the cylinder K ot' a pump. In this instance, the piston of the pump is shown as connected :with a spring-arm, J, operated by a crank and pitman, I, from ,the shaft of the Water-Wheel; but other Well-known forms ofpumps may be used with good effect, such, for instance, as a rotary pump attached directly to the shaft of the Water-Wheel, or

driven therefron'l by a belt and pulley. To heat the fluid, a lamp or gas-jet may be applied to the coils of the pipe L, as shown in Fig. 2, or the duid could be cooled by employ- 'ingI a refrigerating mixture instead ofa heater.

1 am thus enabled, by my improvements, to l l secure a simple and effective motor, to impart a Wide range of motion to the tool, and to combine in one engine an operative instrument, a device for removing from the point operated upon moisture or the filings produced by the instruments, and at the same time to apply, in regulated quantities, a jet or stream of air, gas, or liquid of any desired temperature. Y n Y ,Y Y Y Y Y l. The combination of the frame, the Water- Wheel mounted therein, the rocking bailpivoted on the frame, the tubular shaft-supporting frame mounted on the bail, the driven shaft mounted in bearings in said tubular frame, and a llexible shaft connecting the Water-Wheel and driven shafts, these members being constructed and operating in combination substantially as hereinbefore set forth.

2. The combination, substantially as hereinbefore set forth, of the water-motor, the driven shaft by which the tool is operated, and v the exhaust apparatus for removing moisture, filings, Ste., from the point of operation.

3. The combination,l substantially as hereinbefore set forth, of the Water-motor, the shaft for operating the tool, and the pump for discharging air or fluid at the point of operation.

4. The dental engine hereinbefore set forth, consisting of the combination of the Watermotor, the operating-shaft, the ejector-pump,

and the exhaust appara-tus.

5. The combination, substantially as hereinbefore set forth, with the pump, of the apparatus for varying the temperature of the fluid ejected by it.V

6. The combination, substantially as hereinbeforeset forth, of the tube, the bearings of elastic material arranged at short intervals therein, and the driven shaft. 7. In a dental engine,the combination of the frame, the casing, the percussion-Wheel, the tapering injection-pipe, and the dischargepipe, both arrangedtangentially to the Wheel, as and for the purposes set forth. p

In testimony whereof I have hereunto subscribed my name.

. STEPHEN D. ENGLE.

Witnesses: v

ERAsTUs S. DoUD, p EDWARD F. STRAU. 

